Direct observation of spin splitting in bismuth surface states

被引：146

作者：

Hirahara, T. ^{[1
]}

Miyamoto, K. ^{[2
]}

Matsuda, I. ^{[1
]}

Kadono, T. ^{[2
]}

Kimura, A. ^{[2
]}

Nagao, T. ^{[3
]}

Bihlmayer, G. ^{[4
]}

Chulkov, E. V. ^{[5
,6
]}

Qiao, S. ^{[7
]}

Shimada, K. ^{[7
]}

Namatame, H. ^{[7
]}

Taniguchi, M. ^{[2
,7
]}

Hasegawa, S. ^{[1
,7
]}

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[2] Hiroshima Univ, Grad Sch Sci, Hiroshima 7398526, Japan

[3] Nano Syst Funct Ctr, Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[4] Inst Festkorperforsch, Forschungszentrum, D-52425 Julich, Germany

[5] Donostia Int Phys Ctr, San Sebastian 20018, Spain

[6] UPV, EHU, Dept Fis Mat, San Sebastian 20080, Spain

[7] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7390046, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.76.153305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic structure of ultrathin Bi(001) films on Si(111)-7x7 was studied by spin and angle-resolved photoemission spectroscopy. We directly observed a clear momentum-dependent spin splitting and polarization of the surface-state bands. The spin structure was antisymmetric with respect to the (Gamma) over bar point as predicted by theory, and the obtained in-plane spin polarization was as high as +/- 0.5. The qualitative features of the observed spin polarization are discussed in comparison with the spin-polarized band structure obtained by first-principles calculations.

引用

页数：4

共 26 条

[1] Fermi surface of Bi(111) measured by photoemission spectroscopy -: art. no. 177602 [J].